CriminalIntent项目开发笔记(一)----动态添加Fragment

1.创建Crime实体类

package com.criminalintent;

import java.util.UUID;

/**
 * Created by yeeson on 2015/11/24.
 */
public class Crime {
    private UUID uuid;
    private String title;
    public Crime(){
        uuid=UUID.randomUUID();
    }

    public UUID getUuid() {
        return uuid;
    }

    public String getTitle() {

        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
}

2.定义容器视图activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<FrameLayout  xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/fragmentContainer"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

</FrameLayout>

3.定义CrimeFragment的布局视图

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <EditText
        android:id="@+id/crime_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/crime_title_hint"/>
</LinearLayout>

4.创建CrimeFragment类

package com.criminalintent;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
 * Created by yeeson on 2015/11/24.
 */
public class CrimeFragment extends Fragment {
    private Crime crime;
    TextView titleFiled;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        crime=new Crime();
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.fragment_crime,container,false);
        titleFiled= (TextView) view.findViewById(R.id.crime_title);
        titleFiled.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
                crime.setTitle(charSequence.toString());

            }

            @Override
            public void afterTextChanged(Editable editable) {

            }
        });
        return view;
    }
}

5.在MainActivity 中动态添加CrimeFragment

package com.criminalintent;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        FragmentManager fm=getSupportFragmentManager();
        Fragment fragment=fm.findFragmentById(R.id.fragmentContainer);
        if(fragment==null){
            fragment=new CrimeFragment();
            fm.beginTransaction()
                    .add(R.id.fragmentContainer, fragment)
                    .commit();
        }

    }
}

 最后在模拟其中运行效果如下：