hzuapps#2 hzuapps#158 第二次作业

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903119/Net1414080903119AddActivity.java

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+package edu.hzuapps.androidlabs.homeworks.net1414080903119;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+
+import com.example.administrator.linjingzhen.R;
+
+public class Net1414080903119AddActivity extends AppCompatActivity {
+
+    EditText etName;
+    EditText etSchool;
+    EditText etAge;
+    EditText etHours;
+
+    Button bt;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_net1414080903119_add);
+        etName= (EditText) findViewById(R.id.et_add_name);
+        etAge= (EditText) findViewById(R.id.et_add_age);
+        etHours= (EditText) findViewById(R.id.et_add_hours);
+        etSchool= (EditText) findViewById(R.id.et_add_school);
+        bt= (Button) findViewById(R.id.bt_add);
+        bt.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Teacher teacher=new Teacher();
+                teacher.setSchool(etSchool.getText().toString());
+                teacher.setHours(etHours.getText().toString());
+                teacher.setAge(etAge.getText().toString());
+                teacher.setName(etName.getText().toString());
+                Net1414080903119Presenter.getInstance(Net1414080903119AddActivity.this).addTeacher(teacher);
+            }
+        });
+    }
+}

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903119/Net1414080903119ListActivity.java

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+package edu.hzuapps.androidlabs.homeworks.net1414080903119;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.BaseAdapter;
+import android.widget.ListView;
+import android.widget.TextView;
+
+import com.example.administrator.linjingzhen.R;
+
+import java.util.List;
+
+public class Net1414080903119ListActivity extends AppCompatActivity {
+
+    ListView lv;
+    List<Teacher> list;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_net1414080903119_list);
+        list= Net1414080903119Presenter.getInstance(this).listTeacher();
+        final MyAdapter adapter=new MyAdapter();
+        lv.setAdapter(adapter);
+        lv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
+            @Override
+            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
+                Net1414080903119Presenter.getInstance(Net1414080903119ListActivity.this).deleteTeacher(list.get(position).getName());
+                adapter.notifyDataSetChanged();
+                return false;
+            }
+        });
+    }
+
+    class MyAdapter extends BaseAdapter{
+
+        @Override
+        public int getCount() {
+            return list.size();
+        }
+
+        @Override
+        public Object getItem(int position) {
+            return list.get(position);
+        }
+
+        @Override
+        public long getItemId(int position) {
+            return position;
+        }
+
+        @Override
+        public View getView(int position, View convertView, ViewGroup parent) {
+            if (convertView==null){
+                convertView= LayoutInflater.from(Net1414080903119ListActivity.this).inflate(R.layout.item_net1414080903119,null);
+            }
+            Teacher teacher=list.get(position);
+            TextView tvName= (TextView) findViewById(R.id.tv_item_name);
+            TextView tvAge= (TextView) findViewById(R.id.tv_item_age);;
+            TextView tvSchool= (TextView) findViewById(R.id.tv_item_school);;
+            TextView tvHours= (TextView) findViewById(R.id.tv_item_hours);;
+            tvAge.setText(teacher.getAge());
+            tvName.setText(teacher.getName());
+            tvSchool.setText(teacher.getSchool());
+            tvHours.setText(teacher.getHours());
+            return convertView;
+        }
+    }
+}

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903119/Net1414080903119MainActivity.java

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+package edu.hzuapps.androidlabs.homeworks.net1414080903119;
+
+import android.content.Intent;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+
+import com.example.administrator.linjingzhen.R;
+
+public class Net1414080903119MainActivity extends AppCompatActivity {
+
+    Button btAdd;
+    Button btList;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_net1414080903119_main);
+        btAdd= (Button) findViewById(R.id.bt_to_add);
+        btList= (Button) findViewById(R.id.bt_to_list);
+        btAdd.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                startActivity(new Intent(Net1414080903119MainActivity.this,Net1414080903119AddActivity.class));
+            }
+        });
+        btList.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                startActivity(new Intent(Net1414080903119MainActivity.this,Net1414080903119ListActivity.class));
+            }
+        });
+    }
+}

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903119/Net1414080903119Presenter.java

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+package edu.hzuapps.androidlabs.homeworks.net1414080903119;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by Administrator on 2017/5/31.
+ */
+
+public class Net1414080903119Presenter {
+
+    private SQLiteOpenHelper helper;
+    private static Net1414080903119Presenter presenter;
+
+    private Net1414080903119Presenter(Context context){
+        if (helper==null){
+            helper=new Net1414080903119SQLiteHelper(context);
+        }
+    }
+
+    public static Net1414080903119Presenter getInstance(Context context){
+        if (presenter==null){
+            presenter=new Net1414080903119Presenter(context);
+        }
+        return presenter;
+    }
+
+    public void addTeacher(Teacher teacher){
+        SQLiteDatabase db=helper.getWritableDatabase();
+        ContentValues values=new ContentValues();
+        values.put("name",teacher.getName());
+        values.put("age",teacher.getAge());
+        values.put("school",teacher.getSchool());
+        values.put("hours",teacher.getHours());
+        db.insert("teacher",null,values);
+        db.close();
+    }
+
+    public List<Teacher> listTeacher(){
+        List<Teacher> list=new ArrayList<>();
+        SQLiteDatabase db=helper.getReadableDatabase();
+        Cursor cursor=db.query("teacher",null,null,null,null,null,null);
+        while (cursor.moveToNext()){
+            Teacher teacher=new Teacher();
+            teacher.setName(cursor.getColumnName(cursor.getColumnIndex("name")));
+            teacher.setAge(cursor.getColumnName(cursor.getColumnIndex("age")));
+            teacher.setHours(cursor.getColumnName(cursor.getColumnIndex("hours")));
+            teacher.setSchool(cursor.getColumnName(cursor.getColumnIndex("school")));
+            list.add(teacher);
+        }
+        cursor.close();
+        db.close();
+        return list;
+    }
+
+    public void update(String data,String name,String where){
+
+    }
+
+    public void deleteTeacher(String name){
+        SQLiteDatabase db=helper.getWritableDatabase();
+        db.delete("teacher","name=?",new String[]{name});
+        db.close();
+    }
+
+
+}

AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903119/Net1414080903119UpdateActivity.java

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+package edu.hzuapps.androidlabs.homeworks.net1414080903119;
+
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+
+import com.example.administrator.linjingzhen.R;
+
+public class Net1414080903119UpdateActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_net1414080903119_update);
+    }
+}